Cotter pin



July 14, 1936. F. slos 2,047,295

TTTTTTT IN 'l' I v A in a single operation.

Patented July id,

k actressi in . .31 pom Mum" hppllcation March 22,1935, Se No. 12,d

My invention relates to a new 1.1.: v provement in a cotter pin o! a type which is adapted to project through an opening or a notch formed 'in a nut and through a p; w geway formed in the bolt so as to prevent an unthreading of the nut on the bolt while in use.

It is an object of the present invention to provide a cotter pin so arranged and constructed that rattling while in use will beprevented- 1 Another object of the invention is the provision of a cotter pin so arranged and constructed that it will automatically loch itseli in position so that the thrusting oi the cotter pin through the passageway in the bolt and the locking of the cotter pin in position thereon is performed Another object of the invention is the provision of a cotter pin of this class in'which a considerable saving of time may be eilected in placing the cotter pin' in position and removing it, over that required with the present well known type of cotter pin.

Another object of the invention is the provision of a. cotter pin so constructed 'that it may be economically manufactured, durable during use, light in weight, possessed of no projecting ends when in use, formed from a single piece of metal so constructed that it will not tangle in bunches and that it will not scratch the hands or tear the clothes of the operator when working in such places where cotter pins are used.

Other objects will appear hereinafter.

The invention consists in the combination and arrangement or parts hereinaiter described d claimed.

The invention? will be best understood by 'a rei'erence to-the accompanying to a part oi this specification, and in which,

Fig. 1 is a side elevational view of a bolt showing the invention in position with a part of the bolt broken away and a part in section.

Fig. 2 is a perspective view of the invention.

Fig. 3 is a perspective view of a modified to of the invention.

Fig. 4 illustrates the form sho in Fig. 3 mounted in position in use. r

Fig. 5 illustrates the iorm shown in Fig. l faced Opposite to the direction of inc she in Fig. l.

In Fig. 1, I have illustrated a holt ii having a nut in threaded thereon. This not is provided with the diametrically opposlterecesses ii and it and the bolt is provided with the; passage it formed therethrough. Mounted in this bolt I have shown one tom of the cotter 1 (or. ssi

in Fig, 2 cotter pin is formed from a single strip of resilient material and is'do'ubled upon itself toprovide a loop. One side it of the loop is struck on a curve extending from end to end,

This side it terminates in the curved end portion it, which isv substantially semi circular so as to bringthe end lfi inwardly toward the portion lt and thisportion I6 through the major portion otits lengthis curved to conform to'the curvature of the portion M l he portion is provided on its end with the inturned tongue II, which is adapted to over-lie and engage the end of the portion it. The cotter pin must be of such size that the loop will be larger than the passageway it, through which it is projected'so that as the cotter pin is thrust into position the portion It will approach the portion it so as to open the loop and permit the tongue i1, after it has projected through the opening or passage i3, to spring upwardly and snap into engagement with the bolt in one of the spaces 08 between the threads it. It is thus obvious that the cotter pin automatically locks itself in position on the bolt as it is used. so that further operation on the device, after it has been thrust through the opening is unnecessary. In order to secure the pin in position when thrust into position a strain is placed on the portion l4, tending to straighten it, and this strain remains to a considerable degree after the tongue I! has snapped into the position shown in Fig. 1. It the device were to be permitted to spring into normal position the portion it would snap into engagement with the under surface by the tongue it so that it is obvious irorn an examination of Fig. i that the device is under tension. It will be noted that with a cotter pin of this type, the use of a er or chisel for bending the ends is obviated and a durable, nonrattling device is provided.

In the torso shown in Fig. 3 the portion ll resembles in contour, the portion it shown in Fig.2, but the tongue i1 is bent upon the portion it more than is the tongue it on the portion H. The portion it serves as an abutment to engage the end of the opening formed through the bolt the end of the opening formed through the bolt,

and the tongue ll will snap into engagement with the thre oi the bolt as clearly shown in Fig. 4:.

the advantages numbered are accomplished and a light, strong, durable, and economical cotter pin, which is automatic in its operation is thus provided.

While I have illustrated and described the preterred forms of construction I do not wish to 11mit myself to the precise details of structure shown but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. A cotter pin of the class described, comprising: a strip of resilient material doubled upon itself to provide a loop, both sides of said loop being struck on an arc and flexed in the same direction to lie concentric of each other; and a tongue formed on one end of said strip and extending inwardly toward the other end.

2. A cotter pin oi the class described, comprising: a strip of resilient material doubled upon itself to provide a loop. both sides of said loop being struck on an arc and flexed in the same direction to lie concentric of each other; and a tongue formed on one end of said strip and extending inwardly toward the other end and projecting beyond the same so as to overlie it.

3. A cotter pin 01' the class described, comprising: a strip of resilient material doubled'upon itself to provide a loop, both sides of said loop being struck on an arc and flexed in the same direction to lie concentric of each other; and a tongue formed on one end of said strip and extending inwardly toward the other end and pro- Jecting beyond it so as to overlie and normally rest in engagement with it.

4. A cotter pin or the class described, comprising: an elongated curved resilient body; and an engaging tongue on one end oi. said body bent inwardly toward the inner side of the curve and normally spaced from said body.

5. A cotter pin, comprising: a strip of resilient material doubled upon itself to provide a pair or curved sides; and a tongue formed on the end of one of said sides and bent inwardly toward the inner side of the curve of said side.

6. A cotter pin, comprising: a strip of resilient material doubled upon itself to provide a pair of curved sides; and a tongue formed on the end of one of said sides and bent inwardly toward the inner side of the curve of said end and overlying the end of the other side.

7. A cotter pin comprising: a strip of resilient material doubled upon itself to provide a loop; a hook formed on one end 01 one side of said loop and turned inwardly toward the other side, said sides diverging from each other proceeding away from said hook.

FRANK SIPOS. 

